Deac Karns - Karnsonline

kubernetes cheat sheet

Update an env variable in a running pod kubectl set env deployment <deployment_name> <VAR_NAME>=false -n <namespace> Remove an env variable from a running deployment (note the - after the VAR_NAME) kubectl set env deployment <deployment_name> <VAR_

periodic-rotator

2022-12-14

bash

She Bang Bin Bash

Apparently, Apple is being a big baby and not installing a modern version of bash on macOs any longer. macOs is currently shipping with bash version 3. This is fine in most cases but what if you want to use some of the modern conveniences that come with bash >

astrophotography

Burn exif meta data to photos

People always ask me "what were your camera settings for that photo", so I wrote some bash functions to burn the relevant data to the bottom of the image. The following bash functions assume a few things: you are on a Mac or Linux systemYou know how to modify your

astrophotography

Strawberry Super Moon

Best shot I could get of the strawberry super moon with a foreground object. The humidity was definitely a factor in the focus here.

periodic-rotator

2022-05-18

astrophotography

Shoot the Moon

Unfortunately, it was raining for the lunar eclipse where I live so I got out a couple days before, and a day after to get some photos of the moon. Canon EOS 80D + 150-600mm F5-6.3 DG OS HSM | Contemporary 015 @ 600.0 mm, ISO 800, 1/800 seconds, f/

coding

Netcat Tar Pipe

Lets face it, sometimes we need to move massive amounts of data between servers. wouldn't it be great if it wasn't so darn slow? In some cases rsync would do the job just fine, but it gets slowed down when it has to do checksum checks before and after a

periodic-rotator

2022-03-03

GitLab SSL certificate error

Modify the letsencrypt rb file to disable the staging cert section sudo vi /opt/gitlab/embedded/cookbooks/cache/cookbooks/letsencrypt/resources/certificate.rb comment out the following block acme_certificate 'staging' do alt_names new_resource.alt_names unless new_resource.alt_names.empty? key_size new_resource.key_size

periodic-rotator

2022-01-28

git

Lint Typescript Before pushing with Pre Push Hooks

If you aren't linting your Typescript before pushing your code, you are probably pushing bugs.

linux

Useful Linux Commands

Here are some useful linux commands for the terminal that are not as widely known or used. Many of them can also be used on MacOs as well.

git

Add branch name to commit messages

Let's face it. we have to do some "paper pushing" as a developer sometimes so that all the company's tools work together. USE CASE: As a developer, we are required to add the JIRA ticket number to our commit messages so that the Product Owner and Stakeholders can see what

periodic-rotator

2021-07-29

big sur

Case Sensitive Git on a Mac like a Boss (APFS)

By default, MacOs uses a filesystem format that is not case sensitive APFS. That means that the directories a and A are essentially the same. This is a problem when working collaboratively with people using Linux or another case sensitive file system

periodic-rotator

2021-04-27

periodic-rotator

2021-03-03

big sur

VS Code Big Sur Terminal Lag

If you are dealing with terminal lag with the integrated terminal in vs code since upgrading MacOs to Big Sur, you're not alone. Drop the following command into your terminal. codesign --remove-signature /Applications/Visual\ Studio\ Code.app/Contents/Frameworks/Code\ Helper\ \(Renderer\).app Then restart vs code

sailing

Dockline Handling

spotify

Deac's Periodic Rotator

This playlist rotates periodically, check back or subscribe to it for the latest tunes.

Downgrade Homebrew Cask installed version of package

The techniques herein have been ported from the fantastic blog post located here Cask file You can modify a cask file so it will force brew to install an older version of a package # List installed packages brew cask list # Edit Cask file brew cask edit <PackageName> # e.

ubuntu

Ubuntu No space left on device with plenty of space left

When attempting to use tab completion on my ubuntu 16.04 box running on an AWS EC2 instance I was greeted with the following error in the terminal. cannot create temp file for here-document: No space left on device with plenty of space left I ran the following command to

apache

Apache Multi Instance & Simultaneous PHP Versions

There are plenty of reasons you might want to use multiple versions of PHP on a server. In my case I needed to set up a staging server that will be used to demo various websites and web apps that have different PHP requirements. The following diagram shows the flow

coding

Omnibus GitLab and additional Nginx virtual hosts

So you have a beast of a machine running GitLab and your like, "Man I feel like this thing could probably host some static websites too". Well, you're in luck. The following procedures will have you running additional virtual hosts with the nginx server that is installed with